Add a watermark to a PDF
Stamp documents as CONFIDENTIAL, DRAFT or SAMPLE, or add your name or company, so readers know exactly what they’re looking at.
- No upload: 100% in your browser
- No sign-up
- Free to use
PDF, JPG or PNG · processed on your device, never uploaded
How to watermark PDF
It takes less than a minute with PDFHeron.
Open the PDF
Drop the document onto this page.
Write your watermark
Enter the text and choose size, color, opacity and orientation, with a live preview.
Choose pages
Apply it to all pages, the current page or selected pages.
Save
Download your watermarked PDF.
Looks professional, stays readable
A semi-transparent diagonal watermark is clearly visible without hiding the content underneath. Adjust opacity until it’s just right.
Why use PDFHeron to watermark PDF?
Private by design
PDFHeron processes files on your device. No uploads, no cloud copies, no one else ever sees your documents.
Real editing
Change existing text and delete content from the file itself, not just paint boxes on top of it.
Instant & offline-ready
No queues or upload waits. Big documents open in seconds, and editing keeps working without a connection.
True redaction
Redacted areas are permanently removed from saved PDFs, so hidden text can’t be copied back out.
Standard PDF output
Saved files are regular PDFs with selectable text that open in Acrobat, Preview, Chrome and every other reader.
Free, or $2 once
Use every tool for free. Remove the footer forever with a one-time Pro license, with no subscription.
Watermark PDF: FAQ
Can I watermark only some pages?
Yes. Apply to all pages, the current page, or pages you selected in the Pages panel.
Can I change or remove the watermark later?
Before saving, re-run the tool to replace it, or remove it with one click.
Can I use an image as a watermark?
Use the Image tool to place a logo, then lower its opacity in the side panel.
Edit your PDF now. It’s free
No sign-up, no upload, no waiting. Open a file and start editing in seconds.
Open the PDF editor